Materials Data on TmSi2Ni by Materials Project
TmNiSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Tm is bonded in a 12-coordinate geometry to four equivalent Ni and ten Si atoms. All Tm–Ni bond lengths are 3.00 Å. There are a spread of Tm–Si bond distances ranging from 2.98–3.10 Å. Ni is bonded in a 9-coordinate geometry to four equivalent Tm and five Si atoms. There are a spread of Ni–Si bond distances ranging from 2.25–2.32 Å. There are two inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six equivalent Tm, one Ni, and two equivalent Si atoms. Both Si–Si bond lengths are 2.36 Å. In the second Si site, Si is bonded in a 12-coordinate geometry to four equivalent Tm, four equivalent Ni, and four equivalent Si atoms. All Si–Si bond lengths are 2.77 Å.